Please help, I'm desperate!!!?

My dog is vicious to other animals, and men, and children. My mom thinks she is absolutely the perfect dog! I told her that something is seriously wrong with that dog! She needs like Cesar Milan or Victoria Stillwell, or something! And all my mom has to comment is "Oh no! She's a perfect, sweet little angel. I love her! She improving so much! She doesn't scratch my friends as much any more when they come over!" that's no improvement! She has attacked a little boy on a walk before, viciously attacks other dogs, and hates men! Shes nice to most women and a few men (she's known since she was a puppy, otherwise she hates men! We already had to put down a vicious dog because the law required it, and you would think she would have learned something from that, but it didn't teach her a thing. She has only taken one of our dogs before to a training cl, but this dog has been kicked out of Pet Smart for vicious attacks before we could sign her up for cles. I don't know what to do. I love the dog, but I can't stand her sometimes. She babies the little thing.